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cache: Make cpu_cache_invalidate_memregion() error out if there are no handlers

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Currently, if there are no registered handlers,
cpu_cache_invalidate_memregion() returns 0. Callers are expected to check
cpu_cache_has_invalidate_memregion() and return -ENXIO themselves, instead
of calling this function. If a caller forgets to do this, they may
erroneously think the operation succeeded. This is in contrast to x86,
where cpu_cache_invalidate_memregion() itself checks if the operation is
supported, and returns -ENXIO if it is not.

Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Signed-off-by: Bence Csokas <bence.csokas@arm.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
This commit is contained in:
Bence Csokas 2026-10-01 13:00:07 +02:00 committed by Conor Dooley
parent 75effa4475
commit b2f3a170ae
1 changed files with 2 additions and 2 deletions
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4
lib/cache_maint.c
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@ -59,12 +59,12 @@ static int cache_inval_done_one(struct cache_coherency_ops_inst *cci)
static int cache_invalidate_memregion(phys_addr_t addr, size_t size)
{
int ret;
struct cache_coherency_ops_inst *cci;
struct cc_inval_params params = {
.addr = addr,
.size = size,
};
int ret = -ENXIO;
guard(rwsem_read)(&cache_ops_instance_list_lock);
list_for_each_entry(cci, &cache_ops_instance_list, node) {
@ -78,7 +78,7 @@ static int cache_invalidate_memregion(phys_addr_t addr, size_t size)
return ret;
}
return 0;
return ret;
}
struct cache_coherency_ops_inst *